Hippos Exoskeleton, a human-performance technology startup, today announced a breakthrough in injury prevention: an ultra-light, AI-driven smart knee sleeve that deploys a micro-airbag to stabilize the knee in under 50 milliseconds. The device, tested at Cleveland Clinic's BioRobotics Center, could significantly reduce ACL and orthopedic injuries, particularly among athletes and military personnel.
The sleeve integrates three proprietary technologies: an on-device AI biomechanical engine that analyzes joint angles and torque hundreds of times per second, an ultra-fast micro-airbag actuator that deploys in 30-50 milliseconds, and intelligent textiles embedding sensors, circuitry, and airbags into a 200-gram garment. Unlike traditional bulky braces, the sleeve resembles premium athletic apparel until activated.
At Cleveland Clinic, researchers used a simVITRO robotic knee simulator to test the brace under dangerous injury conditions. Results showed valgus rotation reduced by approximately 11%, anterior tibial translation by about 9%, and internal rotation by roughly 21%. The airbag deployed within 50 milliseconds, inside the critical ACL injury window. Dr. Paul Saluan noted, "Hippos has developed an intuitive protective knee sleeve that could reshape how we think about sports safety. If early results continue to track, it may mark the first real breakthrough in decreasing ACL injuries in a generation."
Knee injuries affect people of all ages and fitness levels, with ACL tears occurring in milliseconds and often ending careers in sports, the military, and other fields. In the U.S. military alone, 800,000 service members suffer musculoskeletal injuries annually, costing over $3.7 billion. Retired III Armored Corps Surgeon Col Jason S. Wieman stated, "The Hippos ultralight AI knee sleeve airbag system represents a groundbreaking leap in protecting our Military. This is the future of military medicine: Prevention, Protection, Performance."
Hippos was founded by Kylin Shaw, whose athletic career ended with an ACL tear at age 17, and Bhavy Metakar, an engineer who built a bionic arm at 17. Shaw drew inspiration from a car accident airbag deployment. The company is now preparing large-scale trials with elite athletic programs and U.S. military units. Shaw emphasizes, "This isn't the bulky uncomfortable knee brace of the past. It's closer to Lululemon meets crash-airbag – powered by AI. And the knee is just the beginning." Hippos plans to develop a full ecosystem of soft exoskeletons for hips, ankles, shoulders, and spine. More information is available at https://www.hippos.life.
